TUT1 – The Ultimate Tone

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Description

The Ultimate Tone – Modifying and Custom Building Tube Guitar Amps

By Kevin O’Connor, ©1995, ISBN 0-9698-6080-3

368 pages, 8½” x 11″, spiral bound with clear protective covers;
395 figures (schematic diagrams)

View the Table of Contents

Read a magazine review of the TUT series

Deciding which TUT volume to purchase first (next)? See our TUT Selection page.

TUT is the book that jump-started the boutique tube guitar amp business!
The Ultimate Tone is an enduring industry standard – as relevant today as when it was published in 1995.

  • learn the truth about tube preamp design and modification
  • see how tube power amps work and how they can be made more reliable
  • see how reverbs and effects loops work and learn better ways to configure them
  • learn why some amp brands are easier to service and to mod than others
  • see how simple switching circuits are but how capable they can be
  • browse tube data for the common types used in guitar and bass amps is provided
  • read a discussion of stage set-up and player ergonomics

TUT itself is an overview of all-things-guitar-amp. Much of its information is accessible to hobbyists of low to moderate skill, while other sections require some schematic reading fluency and circuit knowledge.

The Ultimate Tone offers the technician or hobbyist a wide information base for properly implementing guitar amplifier modifications, and for simply building better guitar amps. Sonic perceptions and stage setups are analyzed to demonstrate how optimal sound can be obtained from existing equipment. A survey of amplifier brands follows, with an eye toward ease of modification and service. Basic vacuum tube operation is clearly presented, as are power supply principles. Preamp circuits and master volumes are explored with a discussion of guitar sustain and interactions, for clean and distorted tones. Power amplifiers are investigated, and power tubes are explored regarding choice of tubes, relative reliabilities of tube types, the relevance of tube matching, and the sonic impact of each tube type. Methods of improving reliability are presented. Tube and solid-state effects loops and reverb loops are investigated, with relative performance issues highlighted. The Best All-tube Effects Loop shown here has been widely copied throughout the industry, as has the jfet-mosfet cascode loop.

An extensive discussion of switching methods is presented, a subject which is rarely explored with regard to guitar systems. Channel, reverb, effects, lead boost, mute and speaker switching are explored. Foot-switch controllers with and without LEDs are detailed, with an eye to multiple controllers for larger stages.

Tube data is provided for the seventeen most common types used in guitar amplifiers, with pin-outs for nine less common numbers.

Replacement transformer data is provided for the two Hammond Mfg. model lines which cover most guitar applications.

The intended reader must be able to work from a schematic.


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